“For those who are wondering about the relationships between the Sonoff and eWeLink brands, I’ve prepared a dependency map. It’s probably not complete, so corrections and additions are welcome.
+----------------------------------+
| CoolKit Technology |
| (Shenzhen CoolKit Technology) |
| - eWeLink cloud & mobile app |
| - accounts, API, provisioning |
+------------------+---------------+
|
|
+-------------------------+--------------------------+
|
|
+-----------v-----------+ +---------------v---------------+
| ITEAD | | Songnuo Technology |
| (Shenzhen ITEAD Co.) | | (Shenzhen Songnuo Tech Co.) |
| - SONOFF brand owner | | - Zigbee OEM manufacturer |
| - Wi-Fi hardware | | - TRVZB, SNZB-02P/03P/04P |
| - NSPanel Pro concept | | - Zigbee firmware (7014/7017) |
+-----------+-----------+ +---------------+---------------+
| |
| |
+--------------v------------------+ +--------------v------------------+
| SONOFF Wi-Fi Devices | | SONOFF Zigbee Devices |
| (Basic, Mini, POW, DUAL…) | | (TRVZB, SNZB-02P, etc.) |
| Designed & built by ITEAD | | Built by Songnuo (OEM) |
+--------------------------------+ +----------------------------------+
+------------------------------------------------+
| OEM Manufacturers |
| - Cameras |
| - BLE sensors |
| - Some NSPanel Pro hardware |
| - Misc accessories |
+------------------------------------------------+
+--------------------------------+
| NSPanel Pro |
|--------------------------------|
| Hardware: OEM manufacturer |
| Zigbee stack: Songnuo |
| Android OS: CoolKit/eWeLink |
| Brand: SONOFF (ITEAD) |
+--------------------------------+
Summary:
CoolKit → operates the eWeLink cloud and mobile app
ITEAD → owns the SONOFF brand, designs most Wi‑Fi hardware, and manufactures the Nextion line of HMI displays
Songnuo → OEM manufacturer responsible for Sonoff’s Zigbee devices
Various OEMs → produce cameras, BLE sensors, parts of NSPanel Pro
A special case is the NSPanel Pro, because although it’s a Sonoff product, it works like this:
- hardware = OEM (not ITEAD),
- Zigbee stack = Songnuo,
- Android firmware = CoolKit,
- cloud = CoolKit/eWeLink,
- Home Assistant integration = possibly connected to SonoffLAN project (AlexxIT).
NSPanel Pro is the most patchwork‑style device in the entire lineup 